Nice use of gradients, lighting and effects thanks for posting!I recently discovered you can specify a gradient with a string, so you can control simple gradients throughout the scene from one place. It would be nice to have a gradient node though for easier editing

I don't know if it is what you need but there is a Gradient Texture Content Node. It provides a texture that can be used throughout the scene by any Texture Input Property. You would need to switch from Texture Loader to Texture Property->Empty on your Material Stage to bind this.

Tips:Defining a Gradient by String can be used e.g. in combination with the Convert To Text Node to create dynamic Gradients. The Gradient Texture Node also provides access to its Keystones via simple Color Input Properties.